Multi-physics system simulation for wind turbines with permanent magnet generator and full conversion power electronics

A comprehensive model for a full-conversion wind turbine is presented in this paper. Multiple mathematical algorithms and software tools were developed and coupled together in a large electrical, mechanical, and controls cosimulation system in order to achieve an optimal balance between computational time and model accuracy. The paper introduces a building-block approach, which starts from the component level and achieves wind turbine system-level simulation integration through a collection of freeware and commercial software. The paper also introduces a unified dq control on the generator and grid side, a generator model and a DC link voltage control scheme that incorporates a resistor with chopping current control. Information for subsystem models, such as rotor blades, gearbox, electric generator and power electronics is included. Simulation results are provided for the Department of Energy (DOE) and National Renewable Energy Laboratory (NREL) baseline 750kW wind turbine for which substantial design and experimental data is publically available.